12218466 has 32 divisors (see below), whose sum is σ = 26449920. Its totient is φ = 3740544.

The previous prime is 12218443. The next prime is 12218489. The reversal of 12218466 is 66481221.

It is an interprime number because it is at equal distance from previous prime (12218443) and next prime (12218489).

It is a super-2 number, since 2×12218466² = 298581822786312, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29670 + ... + 30078.

It is an arithmetic number, because the mean of its divisors is an integer number (826560).

Almost surely, 2^12218466 is an apocalyptic number.

12218466 is an abundant number, since it is smaller than the sum of its proper divisors (14231454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12218466 is a wasteful number, since it uses less digits than its factorization.

12218466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810.

The product of its digits is 4608, while the sum is 30.

The square root of 12218466 is about 3495.4922400143. The cubic root of 12218466 is about 230.3238412323.

Adding to 12218466 its reverse (66481221), we get a palindrome (78699687).

The spelling of 12218466 in words is "twelve million, two hundred eighteen thousand, four hundred sixty-six".